CN215814423U - Battery-powered smoke alarm detector - Google Patents
Battery-powered smoke alarm detector Download PDFInfo
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- CN215814423U CN215814423U CN202121139454.9U CN202121139454U CN215814423U CN 215814423 U CN215814423 U CN 215814423U CN 202121139454 U CN202121139454 U CN 202121139454U CN 215814423 U CN215814423 U CN 215814423U
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Abstract
The utility model discloses a smoke alarm detector powered by a battery, which comprises a main control circuit arranged in the detector, wherein the main control circuit is connected with a battery power supply input circuit for supplying power, a battery electric quantity detection circuit for detecting the electric quantity of the battery, a smoke sensor circuit for detecting smoke and a buzzer driving circuit for driving a buzzer to alarm when smoke is detected or the electric quantity of the battery is low.
Description
[ technical field ]
The utility model relates to a smoke alarm detector powered by a battery.
[ background art ]
Most of the existing smoke alarm detectors need an external power line for power supply, so that the existing smoke alarm detectors need to be provided with the external power line when being installed and used, and are inconvenient to install; the smoke alarm detector powered by the battery consumes a lot of power and cannot detect the electric quantity of the battery and prompt a user to replace the battery, so that the smoke alarm detector is easy to fail due to power failure and cannot play a smoke alarm role; meanwhile, the conventional smoke alarm detector is easy to cause the influence of disturbing residents due to false alarm.
[ contents of utility model ]
The utility model overcomes the defects of the technology and provides a smoke alarm detector powered by a battery.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a smoke alarm detector powered by a battery, comprising: the smoke detector comprises a main control circuit arranged in a detector, the main control circuit is connected with a battery power supply input circuit for supplying power, a battery power detection circuit for detecting the battery power, a smoke sensor circuit for detecting smoke, and a buzzer driving circuit for driving a buzzer to alarm when smoke is detected or the battery power is low, the battery power supply input circuit comprises a boosting chip U4, the input end of the boosting chip U4 is respectively connected with one end of a capacitor C7, the positive end of a point capacitor EC2, a battery power VBAT, one end of a resistor R31, the source end of a field-effect tube Q7 and the negative end of a diode D1, the other end of the capacitor C7, the negative end of the electrolytic capacitor EC2, the positive end of a diode D1 and the field-effect tube Q7 are respectively grounded, the field-effect tube Q7 is connected with the other end of the drain end of the resistor R31, the ground end of the boosting chip U4 is grounded, and the output end of the boosting chip U4 is respectively connected with one end of the capacitor C8, the positive end of the gate end of the point of the capacitor C8, the point, The positive end of the electrolytic capacitor EC3 is connected, and the other end of the capacitor C8 and the negative end of the electrolytic capacitor EC3 are respectively grounded.
A smoke alarm detector as above, characterised in that: the main control circuit is connected with an indicator light circuit for light alarm prompt.
A smoke alarm detector as above, characterised in that: the main control circuit is connected with a key circuit for inputting control instructions.
A smoke alarm detector as above, characterised in that: the main control circuit is connected with a programming interface for burning programs.
A smoke alarm detector as above, characterised in that: the battery power detection circuit comprises a field effect transistor Q4, wherein a source terminal of a field effect transistor Q4 is respectively connected with a battery power supply VBAT and one end of a resistor R23, a grid terminal of the field effect transistor Q4 is respectively connected with the other end of a resistor R23 and one end of a resistor R24, the other end of the resistor R24 is connected with a collector electrode of a triode Q3, a base electrode of a triode Q3 is connected with a main control circuit, an emitter electrode of a triode Q3 is grounded, a drain terminal of the field effect transistor Q4 is respectively connected with one end of the resistor R28 and one end of a resistor R20 through a resistor R19, the other end of the resistor R20 is grounded, the other end of the resistor R28 is respectively connected with one end of a resistor R29 and a cathode end of a diode D3, an anode end of the diode D3 is grounded, and the other end of a resistor R29 is connected with the main control circuit.
A smoke alarm detector as above, characterised in that: the smoke sensor circuit comprises a smoke sensor U2, a pin 4 of the smoke sensor U2 is connected with a positive electrode end of an electrolytic capacitor EC1 and one end of a resistor R12 respectively, a negative electrode end of the electrolytic capacitor EC1 is grounded, the other end of the resistor R12 is connected with an output end of a battery power supply input circuit, a pin 3 of the smoke sensor U2 is connected with a collector of a triode Q1, an emitter of the triode Q1 is grounded through a resistor R13, a base of the triode Q1 is connected with one end of a resistor R14 and one end of a resistor R11 respectively, the other end of the resistor R14 is grounded, the other end of the resistor R11 is used as a test point T4, a pin 1 of the smoke sensor U2 is connected with a pin 2 of an operational amplifier U1.1, one end of a resistor R1 and one end of a capacitor C1 respectively, the other end of the capacitor C1 is connected with the other end of a resistor R1, a pin 1.1 and one end of a capacitor C4 respectively, a pin 4 of the operational amplifier U1.1.1 is grounded, a pin 8 of the operational amplifier U1.1 is connected with a pin 8 and a pin 8 of the amplifier U53 is connected with a main control circuit, and one end of the smoke sensor U53 is connected with a resistor R5 circuit respectively, The operational amplifier U1.1 pin 3 is connected, the other end of the resistor R5 is connected with one end of a resistor R8 and one end of a resistor R10 respectively, the other end of the resistor R8 is connected with a main control circuit, the other end of the resistor R10 is grounded, the other end of the capacitor C4 is connected with one end of a resistor R6 and one end of a resistor R2 respectively, the other end of the resistor R6 is grounded, the other end of the resistor R2 is connected with one end of a capacitor C2 and one end of an operational amplifier U1.2 pin 5, the other end of the capacitor C2 is grounded, a pin 6 of the operational amplifier U1.2 is connected with one end of the resistor R7, one end of a resistor R9 and one end of a capacitor C5 respectively, the other end of a resistor R7 is grounded, a pin 7 of the operational amplifier U1.2 is connected with the other end of a resistor R9, the other end of the capacitor C5 and one end of a resistor R3 respectively, the other end of the resistor R3 is connected with one end of a capacitor C3 and one end of the resistor R4, the other end of the capacitor C3 is grounded, and the other end of the resistor R4 is connected with the main control circuit.
A smoke alarm detector as above, characterised in that: the buzzer driving circuit comprises a connecting terminal SPK1 connected with a buzzer, a pin 1 of the connecting terminal SPK1 is respectively connected with an emitter of a triode Q2, a positive terminal of a diode D2 and one end of an inductor L1, a base of the triode Q2 is respectively connected with a negative terminal of a diode D2, one end of a resistor R21 and a pin 3 of the connecting terminal SPK1, the other end of a resistor R21 is connected with one end of a resistor R16, a collector of the triode Q2 is respectively connected with the other end of the resistor R16, a battery power supply VBAT and a pin 2 of the connecting terminal SPK1, the other end of the inductor L1 is connected with a collector of the triode Q6 through a resistor R30, the emitter of the triode Q6 is grounded, and a base of the triode Q6 is connected with a main control circuit through a resistor R22.
The utility model has the beneficial effects that:
the smoke alarm detector is powered by a battery, an external power line is not needed, meanwhile, the battery electric quantity detection battery is arranged to monitor the electric quantity of the battery in real time, and an alarm prompt is given when the electric quantity of the battery is too low, so that a user can replace the battery in time; meanwhile, the smoke sensor circuit has low power consumption, accurate smoke detection and less false alarm.
[ description of the drawings ]
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of a main control circuit, a battery level detection circuit, an indicator light circuit and a key circuit according to the present invention;
FIG. 3 is a schematic diagram of a battery-powered input circuit according to the present invention;
FIG. 4 is a schematic diagram of a smoke sensor circuit according to the present invention;
FIG. 5 is a schematic diagram of a buzzer driving circuit according to the present invention;
FIG. 6 is a diagram of a programming interface according to the present invention.
[ detailed description of the utility model ]
The following is a more detailed description of embodiments of the utility model, taken in conjunction with the accompanying drawings of which:
as shown in fig. 1-6, a battery powered smoke alarm detector, characterized by: including setting up main control circuit 1 in the detector, main control circuit 1 is connected with the battery power supply input circuit 2 that is used for the power supply, is used for detecting battery power detection circuit 3 of battery power, is used for detecting smoke transducer circuit 4 of smog, is used for driving the buzzer drive circuit 5 that the buzzer reported to the police when detecting smog or battery power is low. When the circuit works, the battery power supply input circuit 2 outputs boosted voltage and supplies power to the main control circuit 1; when the smoke sensor circuit 4 detects smoke and blocks the light transmission of the smoke sensor U2, a detection signal is sent to the main control circuit 1, and the main control circuit 1 controls the buzzer driving circuit 5 to drive the buzzer to alarm for prompting; meanwhile, the battery electric quantity detection circuit 3 monitors the electric quantity value of the battery in real time, when the battery electric quantity is detected and judged to be too low, the main control circuit 1 controls the buzzer driving circuit 5 to drive the buzzer to alarm and prompt a user to replace the battery, the situation that the battery fails and the smoke alarm detector is powered off and cannot work is prevented, alarm sounds of the alarm are different when smoke is detected and alarm sounds of the alarm are different when the battery electric quantity is low, and the user can distinguish the alarm sounds conveniently.
As shown in fig. 1 and 2, the main control circuit 1 is connected with an indicator light circuit 6 for light alarm prompt, and controls the indicator light circuit 6 to work by lighting when smoke alarm is found, so as to realize acousto-optic prompt.
As shown in fig. 1-2, the main control circuit 1 is connected to a key circuit 7 for inputting control commands, and the control commands can be input through keys of the key circuit 7.
As shown in fig. 1 and fig. 6, the main control circuit 1 is connected to a programming interface 8 for programming programs, and programs can be programmed into the main control circuit 1 through the programming interface 8.
As shown in fig. 3, the circuit structure of the battery power supply input circuit 2 includes a boost chip U4, the input end of the boost chip U4 is respectively connected to one end of a capacitor C7, the positive end of a point decoupling capacitor EC2, a battery power supply VBAT, one end of a resistor R31, the source end of a field effect transistor Q7, and the negative end of a diode D1, the other end of the capacitor C7, the negative end of an electrolytic capacitor EC2, the positive end of a diode D1, and the gate end of the field effect transistor Q7 are respectively grounded, the drain end of the field effect transistor Q7 is connected to the other end of the resistor R31, the ground end of the boost chip U4 is grounded, the output end of the boost chip U4 is respectively connected to one end of a capacitor C8 and the positive end of an electrolytic capacitor EC3, and the other ends of the capacitor C8 and the negative end of an electrolytic capacitor EC3 are respectively grounded, wherein the battery power supply input circuit 2 has an anti-reverse connection function.
As shown in fig. 2, the circuit structure of the battery power detection circuit 3 includes a field effect transistor Q4, a source terminal of the field effect transistor Q4 is connected to one end of a battery power VBAT and a resistor R23, a gate terminal of the field effect transistor Q4 is connected to the other end of a resistor R23 and one end of a resistor R24, the other end of the resistor R24 is connected to a collector of a transistor Q3, a base of the transistor Q3 is connected to the main control circuit 1, an emitter of the transistor Q3 is grounded, a drain terminal of the field effect transistor Q4 is connected to one end of the resistor R28 and one end of the resistor R20 through a resistor R19, the other end of the resistor R20 is grounded, the other end of the resistor R28 is connected to one end of a resistor R29 and a cathode of a diode D3, an anode of the diode D3 is grounded, and the other end of the resistor R29 is connected to the main control circuit 1.
As shown in fig. 4, the circuit structure of the smoke sensor circuit 4 includes a smoke sensor U2, a pin 4 of the smoke sensor U2 is connected to the positive terminal of an electrolytic capacitor EC1 and one terminal of a resistor R12, the negative terminal of the electrolytic capacitor EC1 is grounded, the other terminal of the resistor R12 is connected to the output terminal of the battery-powered input circuit 2, a pin 3 of the smoke sensor U2 is connected to the collector of a transistor Q1, the emitter of the transistor Q1 is grounded through a resistor R13, the base of the transistor Q1 is connected to one terminal of a resistor R14 and one terminal of a resistor R11, the other terminal of the resistor R14 is grounded, the other terminal of the resistor R11 is used as a test point T4, a pin 1 of the smoke sensor U2 is connected to a pin 2 of an operational amplifier U1.1, one terminal of the resistor R1 and one terminal of a capacitor C1, the other terminal of the capacitor C1 is connected to the other terminal of the resistor R1, one terminal of the operational amplifier U1.1 pin 1 and one terminal of the capacitor C4, the operational amplifier U1.1 is grounded, a pin 4 is connected to the main controller circuit 1, pin 2 of smoke sensor U2 is connected with one end of resistor R5 and pin 3 of operational amplifier U1.1, the other end of resistor R5 is connected with one end of resistor R8 and one end of resistor R10, the other end of resistor R8 is connected with main control circuit 1, the other end of resistor R10 is grounded, the other end of capacitor C4 is connected with one end of resistor R6 and one end of resistor R2, the other end of resistor R6 is grounded, the other end of resistor R2 is connected with one end of capacitor C2 and pin 5 of operational amplifier U1.2, the other end of capacitor C2 is grounded, pin 6 of operational amplifier U1.2 is connected with one end of resistor R7, one end of a resistor R9 and one end of a capacitor C5 are connected, the other end of a resistor R7 is grounded, a pin 7 of an operational amplifier U1.2 is connected with the other end of the resistor R9, the other end of the capacitor C5 and one end of a resistor R3 respectively, the other end of the resistor R3 is connected with one end of the capacitor C3 and one end of a resistor R4 respectively, the other end of the capacitor C3 is grounded, and the other end of the resistor R4 is connected with the main control circuit 1.
As shown in fig. 5, the circuit structure of the buzzer driving circuit 5 includes a connection terminal SPK1 connected to the buzzer, pin 1 of the connection terminal SPK1 is connected to the emitter of the transistor Q2, the positive terminal of the diode D2, and one end of the inductor L1, the base of the transistor Q2 is connected to the negative terminal of the diode D2, one end of the resistor R21, and pin 3 of the connection terminal SPK1, the other end of the resistor R21 is connected to one end of the resistor R16, the collector of the transistor Q2 is connected to the other end of the resistor R16, the battery power supply VBAT, and pin of the connection terminal SPK1, the other end of the inductor L1 is connected to the collector of the transistor Q6 through the resistor R30, the emitter of the transistor Q6 is grounded, and the base of the transistor Q6 is connected to the main control circuit 1 through the resistor R22.
Claims (7)
1. A smoke alarm detector powered by a battery, comprising: the smoke detector comprises a main control circuit (1) arranged in the detector, wherein the main control circuit (1) is connected with a battery power supply input circuit (2) used for supplying power, a battery power detection circuit (3) used for detecting the battery power, a smoke sensor circuit (4) used for detecting smoke, and a buzzer driving circuit (5) used for driving a buzzer to alarm when smoke is detected or the battery power is low, the battery power supply input circuit (2) comprises a boosting chip U4, the input end of the boosting chip U4 is respectively connected with one end of a capacitor C7, the positive end of a point-release capacitor EC2, a battery power VBAT, one end of a resistor R31, the source end of a field-effect tube Q7 and the negative end of a diode D1, the other end of the capacitor C7, the negative end of the electrolytic capacitor EC2, the positive end of the diode D1 and the field-effect tube Q7 are respectively grounded, the grid end of the field-effect tube Q7 is connected with the other end of the resistor R31, the grounding end of the boosting chip U4 is grounded, the output end of the voltage boosting chip U4 is respectively connected with one end of a capacitor C8 and the positive end of an electrolytic capacitor EC3, and the other end of the capacitor C8 and the negative end of the electrolytic capacitor EC3 are respectively grounded.
2. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the main control circuit (1) is connected with an indicator light circuit (6) for light alarm prompt.
3. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the main control circuit (1) is connected with a key circuit (7) for inputting control instructions.
4. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the main control circuit (1) is connected with a programming interface (8) for burning programs.
5. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the battery power detection circuit (3) comprises a field effect transistor Q4, a source terminal of a field effect transistor Q4 is respectively connected with a battery power supply VBAT and one end of a resistor R23, a grid terminal of the field effect transistor Q4 is respectively connected with the other end of the resistor R23 and one end of a resistor R24, the other end of the resistor R24 is connected with a collector electrode of a triode Q3, a base electrode of the triode Q3 is connected with the main control circuit (1), an emitter electrode of the triode Q3 is grounded, a drain terminal of the field effect transistor Q4 is respectively connected with one end of the resistor R28 and one end of the resistor R20 through a resistor R19, the other end of the resistor R20 is grounded, the other end of the resistor R28 is respectively connected with one end of a resistor R29 and a cathode end of a diode D3, an anode end of the diode D3 is grounded, and the other end of a resistor R29 is connected with the main control circuit (1).
6. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the smoke sensor circuit (4) comprises a smoke sensor U2, a pin 4 of the smoke sensor U2 is respectively connected with an anode end of an electrolytic capacitor EC1 and one end of a resistor R12, a cathode end of the electrolytic capacitor EC1 is grounded, the other end of the resistor R12 is connected with an output end of a battery power supply input circuit (2), a pin 3 of the smoke sensor U2 is connected with a collector of a triode Q1, an emitter of the triode Q1 is grounded through a resistor R13, a base of the triode Q1 is respectively connected with one end of a resistor R14 and one end of a resistor R11, the other end of the resistor R14 is grounded, the other end of the resistor R11 is used as a test point T4, a pin 1 of the smoke sensor U2 is respectively connected with a main control pin 2 of an operational amplifier U1.1, one end of a resistor R1 and one end of a capacitor C1, the other end of a capacitor C1 is respectively connected with the other end of the resistor R1, the pin 1.1 of the operational amplifier U1 and one end of a capacitor C4, a pin 4 of the operational amplifier U1.1 is grounded, a pin 8 of the operational amplifier U1 is connected with the amplifier circuit (1), pin 2 of the smoke sensor U2 is respectively connected with one end of a resistor R5 and pin 3 of an operational amplifier U1.1, the other end of a resistor R5 is respectively connected with one end of a resistor R8 and one end of a resistor R10, the other end of a resistor R8 is connected with a main control circuit (1), the other end of a resistor R10 is grounded, the other end of a capacitor C4 is respectively connected with one end of a resistor R6 and one end of a resistor R2, the other end of a resistor R6 is grounded, the other end of a resistor R2 is respectively connected with one end of a capacitor C2 and pin 5 of an operational amplifier U1.2, the other end of a capacitor C2 is grounded, pin 6 of the operational amplifier U1.2 is respectively connected with one end of a resistor R7, one end of a resistor R9 and one end of a capacitor C5 are connected, the other end of a resistor R7 is grounded, a pin 7 of an operational amplifier U1.2 is connected with the other end of the resistor R9, the other end of the capacitor C5 and one end of a resistor R3 respectively, the other end of the resistor R3 is connected with one end of the capacitor C3 and one end of a resistor R4 respectively, the other end of the capacitor C3 is grounded, and the other end of the resistor R4 is connected with a main control circuit (1).
7. A battery-powered smoke alarm detector as claimed in claim 1, wherein: the buzzer driving circuit (5) comprises a connecting terminal SPK1 connected with a buzzer, a pin 1 of the connecting terminal SPK1 is respectively connected with an emitter of a triode Q2, a positive terminal of a diode D2 and one end of an inductor L1, a base of the triode Q2 is respectively connected with a negative terminal of a diode D2, one end of a resistor R21 and a pin 3 of the connecting terminal SPK1, the other end of the resistor R21 is connected with one end of a resistor R16, a collector of the triode Q2 is respectively connected with the other end of the resistor R16, a battery power supply VBAT and a pin 2 of the connecting terminal SPK1, the other end of the inductor L1 is connected with a collector of a triode Q6 through a resistor R30, the emitter of the triode Q6 is grounded, and a base of the triode Q6 is connected with the main control circuit (1) through a resistor R22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121139454.9U CN215814423U (en) | 2021-05-26 | 2021-05-26 | Battery-powered smoke alarm detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121139454.9U CN215814423U (en) | 2021-05-26 | 2021-05-26 | Battery-powered smoke alarm detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215814423U true CN215814423U (en) | 2022-02-11 |
Family
ID=80173802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121139454.9U Active CN215814423U (en) | 2021-05-26 | 2021-05-26 | Battery-powered smoke alarm detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215814423U (en) |
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2021
- 2021-05-26 CN CN202121139454.9U patent/CN215814423U/en active Active
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